Valve actuating mechanism



SePfl20, '1932- R. J. BUEHLER VALVE ACTUTING MECHNISM Filed Sept. 26, 1,927

New. El l@ Patented Sept. 2l), 1932 RANDOLPH J. BUEHLER, OF BOSTON, MASSACHUSETTS A vnnvn ACTUATING MEcHANIsM Application ledrSeptember 26, 1927. Serial No. 222,113.

The invention relates to valve actuating mechanisms and particularly to means controlling the gas and oil valves of an oil burner in predetermined timed relation, and

L5 has for its object to provide a thermostatically controlled motor cooperating with a gas supply valve and an oil supply valve whereby upon operation of the motor said gas supply valve will be opened for supplying gas to the burner and the oil supply valve will have a slow opening action, whereby a full supply of oil will not be supplied to the burner until v the burner is preheatedby the gas and initial small supply ofoil.

A further obj ect is toy close the gas supply valve as the oil supply valve approaches fully open position.

A further object is to provide the motor shaft with a cam cooperating with a pivoted lever having a link connection with one valve, and which cam rotates slowly and is provided with a link connection with the second valve, and forms means whereby on its initial rotation the first valve is rapidly opened and the oil Yvalve slowly opened, said oil valve being entirely opened after a movement of the cam for substantially one hundred and eighty degrees, and at which time the gas i valve is closed.

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designates an electric motor, which motor is provided with a shaft 2, which is slowly rotated, for instance whereby it will make a Q y 1s controlled by means of the hand operated half revolution in from five to ten minutes, and the speed of which shaft may be controlled by reduction gearing within the motor, or by any suitable means reducing the motor speed, or both. The motor l is controlled by means-of a rotatable disc switch 3, which at predetermined periods will close a circuit through the spring Contact arms l and 5, or through spring contact arms 6 and 5, for operating said motor. VDisposed. adjacent the motor 1 is a ygas supply-pipe 12, whichl pipe is provided with a conventional form of plug valve 13 having an arm 14, and it will be noted by referring to Figure 2 upon the initial rotation of the lplug valve 13, its port 15 will be quickly moved to open posil tion, thereby allowing a full flow of gas through the pipe 12 to a burner to be preheated or started by the gas.,k Pivotally connected to the arm 14 of the plug valve is a link 16, which link is'pivotally connected at 17 vto a pivoted lever 18, andA which lever has its free end* adjacent to the motor shaft 2, '11" and is forced into engagement with the cam 19 by means of an expansion spring 20, therefore it will be seen that as the cam 19 is rotated in engagement with the arm 18, the

. link 16Vwill be forced downwardly for open-' ing the gas valve.` The shaft 2 isprovided with an arm 21, to which is adjustably connected'at 22 a link 23, and which link is pivotally connectedat 24 to an arm 25 carried by a threaded needle valve 26, and which( needle valve has a relatively slow opening operation in comparison to the rapid opening of the gas valve 13, whereby the gas will be supplied to the burner well before the oil through the oil supply pipe 27, controlled by' the needle valve 26.V yUpon movementofthe cam 19 to the dotted line position a, which isa distance substantially ninety degrees, the

`gas valve 13 will :be entirely on, while the oilvalvewill be only slightly opened, and"v upon movement of the cam 19 to the dotted Vline'position b, the gas valve 13 will be closed and the oil valve will be entirely on, therefore it will ,becseen that the gas is supplied to theburner for preheating purposes a subi-'1 stantial time before a full supply vof oil is supplied to Ythe burner. The oil pressure valve 48. t .M ,i The motor 1 is controlled by a suitable thermostat (not shown), disc switch and spring Contact arms 4, 5 and 6 in a manner whereby it will operate only sufficiently to rotate shaft 2 one-half of a revolution or 180 degrees at one time. Thus, when the motor circuit is closed, as through switch 3 and contact arms 5 and 6, the gas valve 13 and the oil valve 26 both being closed, the shaft 2 and cam 19 and arm 21 carried thereby are rotated for 180 degrees to dotted. line position Z), quickly opening and then closingv gas valve 13 and slowly opening the oil valve 26,whereby at the end of the 180 degree movement of shaft 2 only the oil valvewi'll be open. quently, upon reestablishiiig the motor circuit, as through switch 3 and Contact arms 4 VAand 5, the motor is again operated to rotate Vshaft 2 one-half revolution. This second half revolution -moves arm21 carried by shaft 2 to its starting position, whereby oil valve 26 is closed. The gas valve is not operated 'by this second movement of shaft 2 inasmuch as the gas valve operating lever 18 rides upon the end of cam 19 concentric of shaft 2. In this way the motor operated shaftJ 2 operates and controls valves 13 and 26 in predetermined timed relation as required in the operation of the oil burner. l

The oil supply pipe 27 is provided with a valve 44 `having a control lever 45 on which is "suspended an overflow bucket 46, and into which bucket any excess oil is discharged by vthe overflow pipe 47, which vleads from the burner and discharges into the bucket, therefore it will be seen in case of flooding, or

failure of the gas or ignition through any cause, the oil supply will be cut off.

rllhe invention having been set forth what isclaimed as new and useful is V- 1. The combination with a motor having whereby said plug valve will be opened upon Vpartial rotation of the cam, an arm carried `Vbythe screw valve, a link connection between Vsaid arm and the cam and forming means whereby upon rotation of the cam substantially' one hundred and eighty degrees said "screw valve will be in opened position and the plug valve in closed position.

2. The combination with a motor having *a shaft,a plugvalve adjacentsaid motor, -a

threaded -valve adjacent said motor, a cam carriedby said motor shaft, a pivoted member ,with `which said cam engages, spring means forl forcing the pivoted member towards the cam, an arm carried by the plug Vvalve,aI link connection between the plug valve arm and the pivoted member, an arm i' carried by the threaded valve, and a link connection between said last named arm and the cam.

3. Theconibination with a motor having a I Subsevof .a cam carried by the motor shaft, a cam- Aengaging membenran -operative connection `between said cameengaging member and one of said valve arms, and cams carried by the other valve arm and pivotally secured to said shaft eccentrical-ly thereof, said connections being arranged whereby upon each rotation of said shaft one of said valves will be quickly vopened and closed by said cani-engaging member and the other valve will be slowly .opened and closed by said last named means.

5. The combination with a pair of valves, arms carried by said valves, of a motor having a shaft, a cam carried by said shaft, .a

pivoted member adjacent the cam, spring 'means maintaining said pivoted member `in engagement with the cam, a link connection between the pivoted member and the ar-ni of one of said valves, and a link pivotally secured to said cam Vand the arm ofthe other valve, said first named link operating one of said valves upon depression of said pivoted member by the nose of said cam, andsaid last named link operating the otherva-lve at allV times in the rotation of said shaft;v

6. The combination with'a pair of valves, arms carried by said valves, of a motorhaving a shaft, a cam carried by said shaft, means carried by one ofsaid arms and engaging the peripheryv of saidcam to operate one of said valves upon engagement of 'the cam nose therewith, and means carried bythe other arm and pivotally secured to said shaft eccentrically thereof to open said valve upon a halfrevolution of the shaft and to close said valve upon the succeeding half revolution of the shaft. v

In testimony 'whereof VIfaiiix my signature.

' RANDOLPH J. BUEHLER.

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